testing OfflineContext

test/core/OfflineContext.js

@@ -0,0 +1,34 @@
+define(["Test", "Tone/core/OfflineContext"], 
+	function (Test, OfflineContext) {
+
+	context("OfflineContext", function(){
+
+		it("can be created", function(){
+			new OfflineContext(1, 0.1, 44100);
+		});
+
+		it ("render returns a promise", function(){
+			var ctx = new OfflineContext(1, 0.1, 44100);
+			var render = ctx.render();
+			expect(render).to.be.instanceOf(Promise);
+			return render;
+		});
+
+		it ("can render audio", function(){
+			var ctx = new OfflineContext(1, 0.2, 44100);
+			var osc = ctx.createOscillator();
+			osc.connect(ctx.destination);
+			osc.start(0.1);
+			return ctx.render().then(function(buffer){
+				expect(buffer).to.be.instanceOf(AudioBuffer);
+				var array = buffer.getChannelData(0);
+				for (var i = 0; i < array.length; i++){
+					if (array[i] !== 0){
+						expect(i/array.length).to.be.closeTo(0.5, 0.01);
+						break;
+					}
+				}
+			});
+		});
+	});
+});